Rain (flow of liquid) / Reign (e.g. the period that a monarch is king or queen or the Reign of Terror... the period of violence that occurred during French Revolution.
BTW, quizmad, did you eventually find the answer to the one that we were puzzling over re possibly concerning the ancient mariner and Weston-Super-mare? the place you thought should begin with J or K?
I've just been looking at a copy of Devon Life magazine.
Coleridge was born in Ottery Saint Mary and although I can't remember the exact clue, it has the same letter count as Weston super Mare. Could this be the answer?